Chapter 25 Information Led Operation Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

25
INFORMATION LED OPERATION FUNCTION
This function operates the display status of the INFORMATION LED from a user program.
Display specifications of the INFORMATION LED
The following table shows the display specifications of the INFORMATION LED.
LED name
INFORMATION LED
*1 Flashing occurs at the following intervals:
 Flashing: 200 ms
 Slow flashing: 1 sec
Operation method
The display status of the INFORMATION LED can be operated by turning the special relay (SM680) and special register
(SD680) from OFF to ON with MELSEC data link functions. The result is stored in the special register (SD681). (Page
273 Special Relay List, Page 276 Special Register List)
1.
Store a value to specify the LED display status to SD680.
2.
Turn SM680 from OFF to ON at a desired time to turn ON or OFF the INFORMATION LED.
When SM680 turns ON, the INFORMATION LED is turned ON or OFF. After the INFORMATION LED turns ON or OFF, the
result is stored in SD681 then SM680 is turned from ON to OFF.
The INFORMATION LED is turned ON or OFF by checking the status of SM680 at a refresh cycle. Therefore,
if SM680 is turned from OFF to ON then back to OFF within the refresh cycle, the INFORMATION LED status
does not change. (Page 181 FIXED CYCLE PROCESSING FUNCTION)
3.
Check if the INFORMATION LED is operated correctly.
• When operated correctly, SD681 has the same value as SD680.
• When operated incorrectly, SD681 has a different value from SD680.
Precautions
If a value out of range is stored in SD680, the LED is not operated correctly. To check if it is operated correctly, compare the
values between SD680 and SD681 and check that the values match.
Display specification
OFF
ON (red)
*1
Slow flashing (red)
*1
Flashing (red)
ON (green)
*1
Slow flashing (green)
*1
Flashing (green)
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